Combined punch



(No Model.) 2 Sheets-Sheet 1. P. BROADBOOKS.

COMBINED PUNCH, SHEARS, AND GUT-OFF. No. 582,618. Patented May 18,1897.

wrzmm a (No Model.) 2 Sheets-Sheet 2.

, P. BROADBOOKS. COMBINED PUNCH, SHEARS, AND GUT-OFF.

No. 582,618. Patented May 18, 1897.

Illllllf Hill ' NITED STATES PETER BROADBOOKS, OF BATAVIA, NEIV YORK.

COMBINED PUNCH, SHEARS, AND CUT-OFF.

SPECIFICATION forming part of Letters Patent No. 582,618, dated May 18,1897.

Application filed August 19, 1896. Serial No. 603,168. (No model.)

To all whom, it may concern:

Be it known that I, PETER BROADBOOKS, a citizen of the United States,residing at Batavia, in the county of Genesee and State of New York,have invented a certain new and useful Improvement in a Combined Punch,Shears, and Cut-Off, of which the following is a specification.

My invention relates to a new and useful improvement in a combinedpunch, shears, and cut-oif, and has for its object to so construct adevice as to greatly facilitate the application of power to the severaloperating members of the device, and to so connect the punch and shearsas to permit disconnection when it is desired touse the punch only, anda further object is to provide gages and stops for the regulation of theoperations to be performed by the device.

VVit-h these ends in view this invention consists in the details ofconstruction and combination of elements hereinafter set forth and thenspecifically designated by the claims.

In order that those skilled in the art to which this inventionappertains may understand how to make and use the same, the constructionand operation will now be described in detail, referring to theaccompanying drawings, forming a part of this specification, in which-Figure l. is a side elevation of a combined shears and cut-ofi made inaccordance with my improvement; Fig. 2, a central vertical longitudinalsection thereof; Fig. 3, an end view looking toward the punch; Fig. 4, asimilar view taken from the opposite end of the device, and Fig. 5 asection at the line :1: 0c of Fig 1.

Referring to the drawings, A represents the base of the device, adaptedto be bolted to a bench or bed by means of the ears l3, and formed withthis base is the frame 0, which in practice I prefer to make in twohalves, as well as the base, so cast as to provide recesses andprojecting parts for the reception and retention of the severaloperating parts thereof, and these halves are preferably securedtogether by bolts and nuts.

In the formation of the frame overhanging headsD andE are provided, andin the former is fitted to slide vertically a punch-plunger F, to thelower end of which is secured the desired form of punch G by anysuitable arrangement, which in practice is usually attached by formingthe shank of such punch upon the taper and forcing it. within acorrespondingly taper hole in the plunger or follower.

"Within the upper portion of the head D is pivoted the cam H by means ofthe bolt 1, and this cam has formed therewith an arm J for itsoperation. In order that considerable strain or pressure may be impartedto the plunger F from the cam II without undue friction between saidplunger and cam, the latter is cut away at K, thereby producing aneccentric surface. Between it and the upper end of the plunger isinterposed a toggleblock L. This block is held in place by a pin M,projecting therefrom into a suitable hole in the top of the plunger, andthe pins N, also projecting therefrom and adapted to enter holes in theeccentric surface. Thus when this cam is turned upon its axis thetoggleblock will act as a gear in connection with the eccentric surface,and the force transmitted from said surface to the plunger will bedirectly through the block, thereby bringing little or no sidewisestrain upon either the cam-block or plunger. Another advantage of thisarrangement in the transmissions of power from the cam to the plunger isthat the toggle-block gradually approaches the line connecting thefulcrum of the cam and the point at which said block bears upon theplunger, thereby increasing the leverage between said cam and plunger,whereby a greater amount of force will be brought to bear upon saidplunger, and the advantages of this arrangement will be obvious.

In order that the plunger may be drawn upward when the cam is revolvedin the opposite direction, a link 0 connects said cam and plunger byhaving its ends pivoted thereto, as clearly shown in Fig. 2.

P represents two projecting lugs between which the operating lever orhandle Q. is pivoted at B, so as to have a swinging movement, and curvedlinks S are pivoted at Tto this handle and at U and the arm J, fromwhich it will be seen that the punch-plunger may be forced downward orelevated by the operations of the handle.

The reason for curving the links S is that the handle may be swungdownward to such an extent as to cause the point T to pass around and tothe opposite side of the point B to such an extent as to bring thepoints T R U in almost a straight line, with the obvious result ofincreasing the amount of force transmitted to the arm J from the handleas said handle is forced downward, as is well understood in connectionwith the toggle-joints. The upward movement of the handle may be limited'by coming in contact with the rib V.

The stripper \V depends from the overhanging head D, and is so arrangedrelative to the punch G as to serve the purpose of preventing the upwardmovement of the metal which has been punched when the punch is elevated,as is well understood, and a gage- .finger X is adj ustably secured inthe ln g Y by means of the set-screw Z, so that it may be placed in anyposition for the desired regulation of the position at which the punchwill operate upon the work. I have here shown the die-block a hold in arecess in the base by means of the set-bolts b.

The opposite end of the device is utilized for the construction of theshears, andin the overhanging head E is pivoted the cam 7L, similar inall respects to a cam ll, by means of the bolt i, and this cam isconnected to the movable shear-bladefby means of the link 0, and iscaused to force this shear-blade downward through the medium of thetoggleblock Z, which is constructed and operates as described inconnection with the togglebloek L. The movable shear-blade is pivoted atd and has secured thereto by means of suitable bolts the cutter e. Thestationary cutter m is bolted to the stationary jaw 12, so that whenthese cutters become dulled or useless from any other cause others maybe substituted therefor, or they be sharpened and replaced. The movableshear-blade isgiven its operations by means of the cam 7L, upon which isformed an arm j, connected by means of the pitman p to the arm J, fromwhich it will be seen that when the lastnamed arm is swung to and fro bythe operations of the handle, as before described, the arm j will movein unison therewith, thus causingboth the shears and punch to operate inunison and with an equal amountof force, so that when certain classes ofwork are being performed which require at one time the use of the punchand at another the use of the shears the operator is not compelled tochange any part of the machine or his position, as he has only tooperate the single hand to effect operations of both punch and shears,yet should at any time the punch alone be needed for considerable usethe shears may be disconnected therefrom by the removal of the pitman p,which will cause said shears to remain inactive during the operations ofthe punch.

One of the advantages of the construction here shown is that the forceapplied to both the punch and shears is in nearly a direct downwardline, and therefore little or no tendency is had for either said shearsor punch to spring sidewisc, thereby avoiding the drawing in which wouldotherwise take place were there lateral movement during the operationsof either the punch or the shears.

It is to be noted in connection with the shears that as the movableblade continues to operate upon the work, thereby losing leverage as thecutting operation recedes from the pivoted point of the movable blade,the force exerted upon said blade is increased by the actions of the camand togglcblock, so that the shearing of a piece of metal, however wide,within the limits of the shears will require no more force to be appliedto the handie at the finishing of the operations than at the beginningthereof. This is of considerable importance, since, as is wellrecognized, any metal working the decrease of the leverage of ashear-blade relative to the work will cause said blade to finish itswork with a snap, often injuring the blade and at all times leaving anundesirable bur upon said work.

q represents a holder secured to the frame and head by the bolts 0* ands and is for the purpose of keeping the metal to be sheared fromspringing upward when operated upon, thereby preventing the reactionupon the movable blade which would take place were the metal permittedto rise, and this reaction invariably tends to force the movable bladeaway from the stationary blade, with the consequent result of bendingthe movable blade out of position.

If desired, a gage to the shear, consisting of a right-angle rod 2,maybe adjustably held in the lug u by means of the set-screw n, so thatwhen properly adjusted the distance from the edge of the metal at whichthe punch operates thereon may be determined. It is also obvious thatthe finger X may be utilized so as to serve as a gage for determiningthe lengths of sheet metal out by the shears or the distance apart ofholes punched in a strip by adjusting it in the lug Y until it crossesthe path of the work at the desired point.

The euttin g off of round metal, such as rods or wire, is provided forby the securement of the die-plate 10 within the frame adjacent theenlargement of the movable shear blade, which is designed for thispurpose, and the securement of a like die-plate 1 within thisenlargement and the formation of holes through said plates, enlargement,and frame, as indicated ate. 'lhe'operations of this part of the deviceare as follows: The die-plates moving in contact with each other when inalinement will permit the passage of the rod to be cut through one ofthe holes 0, after which, by the swinging of the shear-blade through theoperation of the handle, the dieplate 3 will be so moved as to cause theedges of the holes to serve as cutting edges, which IIC will sever therod after the manner of a sheardie. The lengths in which the rod issevered may be determined by the gage-finger X, since said gage-fingermay be adjusted in alinement with the rod when passed through either ofthe holes I am aware that a number of slight modifications may be madein the construction here shown and described Without departing from thespirit of my invention, and I therefore do not wish to be understood aslimiting myself to these exact details of design.

Having thus fully described my invention, what I claim as new and usefulis- 1. The herein-described combination of a base, a frame formed in twohalves and secured together by means of bolts, a punchplunger fitted inone end of the frame, a cam pivoted in said end, a toggle-block Linterposed between the cam and plunger, a link 0 connecting said plungerand cam, an arm J formed with the cam, an operating-lever Q also pivotedto the frame, a curved link S connecting said lever with the arm J, ashearblade f pivoted within the frame, a cam h also pivoted within theframe, a toggle-block e interposed between said cam and blade, a

link 0 for connecting said blade and cam, an arm J formed with said cam,a pitman p for connecting the arms J andj, die-plates y and 10 havingholes formed therethrough arranged to come in alinement, and a series ofgages for determining the operations of the device, substantially as andfor the purpose set forth.

2. In a device of the character described, a frame, a punch-plungerslidable therein, a cam journaled in the frame adapted to operate theplunger, an arm projecting from the cam, an operating-lever pivoted tothe frame, a link connecting the arm to the lever, a cutfer-bladepivoted in the frame, a second cam adapted to operate the cutter-bladehaving a projecting arm and a pitman connecting the two arms, as and forthe purpose described.

3. In a device of the character described, a frame, a punch-plungerslidable therein, a cam journaled in the frame, a toggle-block havingteeth to fit apertures in the cam and plunger, a link connecting theplunger and cam, an operating-lever pivoted to the frame a curved linkconnecting the lever to an arm of the cam, a shear-blade pivoted in theframe, a cam and toggle similar to the others adapted to operate theblade and a pitman connecting arms of the cams, as and for the purposedescribed.

In testimony whereof I have hereunto affixed mysignature in the presenceof two subscribing witnesses.

PETER BROADBOOKS.

\Vitnesses:

S. S. vVILLIAMsoN, W. E. WEBsrER.

